<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- 可以封装自定义属性 -->
		<!-- <my-search :backgroundColor="'pink'" :borderRadius="'50%'"></my-search> -->
		<my-search @myclick="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区 -->
			<scroll-view scroll-y="true" :style="'height: '+winHeight+'px;'" class="left-scroll-view">
				<view :class="['left-scroll-view-item',index===active?'active':'']" v-for="(item,index) in cateList"
					:key="index" @click="activeChange(index)">
					{{item.cat_name}}
				</view>
			</scroll-view>
			<!-- 右侧的滑动区 -->
			<scroll-view scroll-y="true" :style="'height: '+winHeight+'px;'" class="right-scroll-view"
				:scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
					</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv2-list">
						<view class="cate-lv2-imgtextbox" v-for="(item3,index3) in item2.children" :key="index3"
							@click="gotoGoodsList(item3)">
							<!-- 三级分类下的图片 -->
							<image :src="item3.cat_icon.replace('dev','web')" mode=""></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>

				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import {
		mapMutations,
		mapGetters
	} from 'vuex'
	export default {
		data() {
			return {
				//设备高度
				winHeight: 0,
				//请求后端的分类
				cateList: [],
				active: 0,

				//二级分类的列表
				cateLevel2: [],

				//重置右侧滚动条
				scrollTop: 0

			};
		},
		onLoad() {
			const win = uni.getWindowInfo().screenHeight
			this.winHeight = win - 50
			console.log(this.winHeight)
			this.getCateList()
		},
		onShow() {
			this.setBadge(this.total)
		},
		watch: {
			total(newVal) {
				this.setBadge(newVal)
			}
		},
		computed: {
			...mapGetters('m_cart', ['total'])
		},
		methods: {
			...mapMutations('m_cart', ['setBadge']),
			//获取分类列表的数据
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				// console.log(res)
				if (res.meta.status !== 200) {
					return uni.$showMsg()
				}
				this.cateList = res.message
				this.cateLevel2 = res.message[0].children
			},

			// 点击切换左侧滚动条选项
			activeChange(index) {
				this.active = index
				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[index].children
				//重置右侧滚动条
				this.scrollTop = Math.random()
			},
			//三级分类点击进入列表
			gotoGoodsList(item3) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			},
			//搜索组件绑定自定义事件触发后执行的回调函数
			gotoSearch() {
				// console.log("111")
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-style: 12px;

				&.active {
					background-color: #fff;
					position: relative;

					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top: 15px;
					}
				}
			}
		}

		.right-scroll-view {
			.cate-lv2 {
				margin-top: 20rpx;

				.cate-lv2-title {
					font-size: 12px;
					font-weight: bold;
					text-align: center;
					padding: 15px, 0;
				}

				.cate-lv2-list {
					display: flex;
					flex-wrap: wrap;

					.cate-lv2-imgtextbox {
						width: 33.33%;
						display: flex;
						flex-direction: column;
						justify-content: center;
						align-items: center;

						image {
							width: 60px;
							height: 60px;
						}

						text {
							font-size: 12px;
						}
					}
				}
			}
		}
	}
</style>
